Corowell

Corowell offers an easy, rapid & low-cost way to objectively screen a suspected COVID-19 symptom by testing your sense of smell.
Corowell is easy, fast & non-invasive.
This is how it works:
1. Scan the QR Code inside the Corowell Ticket (sold separately)
2. Scratch the Scent Field
3. Smell it
4. Select the correct Scent in the app
5. Answer the Questionnaire
6. Get your Pass
Add the Corowell Pass to your Apple Wallet and present it quickly wherever the Corowell service is offered.
The latest scientific data indicates that the majority of those infected with Covid-19 experience a loss of the sense of smell (Anosmia) as the first symptom, typically within 1-3 days of initial infection.
Sources:
„The occurrence of olfaction dysfunction with COVID-19 is demonstrated to be frequent, respectively from (...) 86% of cases.“ (Yan CH, Faraji F, Prajapati DP et al.
“Association of chemosensory dysfunction and Covid-19 in patients presenting with influenza-like symptoms”. Int Forum Allergy Rhinol 2020;10(7):806-813.)
„Olfactory dysfunction has been shown to be the strongest predictor of COVID-19 positivity when compared to other symptoms“ (Rocke J, Hopkins C, Philpott C et al.
“Is loss of smell a diagnostic marker in COVID-19: A systematic review and meta-analysis”. Clin Otolaryngol 2020 Aug 1: 10.1111/coa.13620. doi: 10.1111/coa.13620.